We've known for more than a decade that the key to weight-loss is to consume fewer calories than you're burning--in other words, eat less, exercise more, or both. That dietary adage was confirmed last week by researchers from the Harvard School of Public Health, with a widely reported study in the New England Journal of Medicine.
In the study, researchers put 811 overweight adults on one of four weight loss plans, which were supposed to vary widely in fat, protein, and...
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